在无状态 EJB Bean 中检索 EnityManagerFactory 时出现问题
Problems retrieving EnityManagerFactory in an stateless EJB Bean
我很难从 ejb 项目将 UserEntity 持久保存在我的 JavaDB 上。我从各种 google 搜索中尝试了几个解决方案，但似乎都没有帮助我。
我正在使用 GlassFish 4 和它附带的 JavaDB。
这是我的 Statlessbean，它需要 EntityManager
据我了解，它应该由容器通过@PersistenceContext 注入。
@Stateless
public class UserManagementBean implements UserManagementLocal, UserManagementRemote {
@PersistenceContext(unitName = "ChatDB")
private EntityManager entityManager;
@EJB
private ChatManagementLocal chatManagement;
@EJB
private StatisticManagementLocal statisticManagement;
//...
@Override
public void login(String username, String password) throws Exception {
//...
}
@Override
public void logout(String username) {
//...
}
@Override
public void registerUser(String username, String password) throws Exception {
TypedQuery<UserEntity> query = entityManager.createNamedQuery("UserEntity.singleUser", UserEntity.class);
query.setParameter("username", username);
UserEntity foundUser;
try {
foundUser = query.getSingleResult();
} catch (NoResultException e) {
foundUser = new UserEntity();
foundUser.setLoggedIn(false);
foundUser.setUsername(username);
foundUser.setPassword(generateHash(password));
entityManager.persist(foundUser);
chatManagement.sendRegisterMessage(username);
}
throw new Exception("Der Benutzername ist bereits vergeben.");
}
public String generateHash(String password { ... }
}
项目-ejb
--元信息
----persistance.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"
xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="ChatDB" transaction-type="JTA">
<jta-data-source>java:app/jdbc/ChatDB</jta-data-source>
<jar-file>Chat-common.jar</jar-file>
<properties>
<property name="eclipselink.target-database" value="Derby"/>
<property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
<property name="eclipselink.logging.level" value="INFO"/>
</properties>
</persistence-unit>
</persistence>
project-ear
--元信息
----glassfish-resources.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE resources PUBLIC
"-//GlassFish.org//DTD GlassFish Application Server 3.1 Resource Definitions//EN"
"http://glassfish.org/dtds/glassfish-resources_1_5.dtd">
<resources>
<jdbc-connection-pool name="ChatDBPool"
res-type="javax.sql.ConnectionPoolDataSource"
datasource-classname="org.apache.derby.jdbc.ClientDataSource">
<property name="serverName" value="localhost" />
<property name="port" value="1527" />
<property name="databaseName" value="chat" />
<property name="connectionAttributes" value=";create=true"></property>
<property name="user" value="APP" />
<property name="password" value="APP" />
</jdbc-connection-pool>
<jdbc-resource enabled="true"
jndi-name="java:app/jdbc/ChatDB"
pool-name="ChatDBPool" />
</resources>
控制台
javax.ejb.EJBException
at com.sun.ejb.containers.EJBContainerTransactionManager.processSystemException(EJBContainerTransactionManager.java:752)
at com.sun.ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:702)
at com.sun.ejb.containers.EJBContainerTransactionManager.postInvokeTx(EJBContainerTransactionManager.java:507)
at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4566)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2074)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2044)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:212)
at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:79)
at com.sun.proxy.$Proxy286.registerUser(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie.dispatchToMethod(ReflectiveTie.java:143)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:173)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatchToServant(ServerRequestDispatcherImpl.java:528)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatch(ServerRequestDispatcherImpl.java:199)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequestRequest(MessageMediatorImpl.java:1549)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:1425)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleInput(MessageMediatorImpl.java:930)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:213)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:694)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.dispatch(MessageMediatorImpl.java:496)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.doWork(MessageMediatorImpl.java:2222)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName ChatDB
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.init(EntityManagerWrapper.java:138)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper._getDelegate(EntityManagerWrapper.java:171)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createNamedQuery(EntityManagerWrapper.java:544)
at de.fh_dortmund.inf.cw.chat.server.beans.UserManagementBean.registerUser(UserManagementBean.java:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4786)
at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:656)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:73)
at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:52)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163)
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140)
at sun.reflect.GeneratedMethodAccessor71.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369)
at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4758)
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4746)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:205)
... 19 more
在这一点上我不知道如何开始这个问题，我错过了什么？我应该检查什么？您还需要什么详细信息？
这个：
project-ejb
--META-INF
----persistance.xml
看起来很可疑。
您似乎拼错了 "persistence.xml"。
我很难从 ejb 项目将 UserEntity 持久保存在我的 JavaDB 上。我从各种 google 搜索中尝试了几个解决方案，但似乎都没有帮助我。
我正在使用 GlassFish 4 和它附带的 JavaDB。
这是我的 Statlessbean，它需要 EntityManager 据我了解，它应该由容器通过@PersistenceContext 注入。
@Stateless
public class UserManagementBean implements UserManagementLocal, UserManagementRemote {
@PersistenceContext(unitName = "ChatDB")
private EntityManager entityManager;
@EJB
private ChatManagementLocal chatManagement;
@EJB
private StatisticManagementLocal statisticManagement;
//...
@Override
public void login(String username, String password) throws Exception {
//...
}
@Override
public void logout(String username) {
//...
}
@Override
public void registerUser(String username, String password) throws Exception {
TypedQuery<UserEntity> query = entityManager.createNamedQuery("UserEntity.singleUser", UserEntity.class);
query.setParameter("username", username);
UserEntity foundUser;
try {
foundUser = query.getSingleResult();
} catch (NoResultException e) {
foundUser = new UserEntity();
foundUser.setLoggedIn(false);
foundUser.setUsername(username);
foundUser.setPassword(generateHash(password));
entityManager.persist(foundUser);
chatManagement.sendRegisterMessage(username);
}
throw new Exception("Der Benutzername ist bereits vergeben.");
}
public String generateHash(String password { ... }
}
项目-ejb
--元信息
----persistance.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"
xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="ChatDB" transaction-type="JTA">
<jta-data-source>java:app/jdbc/ChatDB</jta-data-source>
<jar-file>Chat-common.jar</jar-file>
<properties>
<property name="eclipselink.target-database" value="Derby"/>
<property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
<property name="eclipselink.logging.level" value="INFO"/>
</properties>
</persistence-unit>
</persistence>
project-ear
--元信息
----glassfish-resources.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE resources PUBLIC
"-//GlassFish.org//DTD GlassFish Application Server 3.1 Resource Definitions//EN"
"http://glassfish.org/dtds/glassfish-resources_1_5.dtd">
<resources>
<jdbc-connection-pool name="ChatDBPool"
res-type="javax.sql.ConnectionPoolDataSource"
datasource-classname="org.apache.derby.jdbc.ClientDataSource">
<property name="serverName" value="localhost" />
<property name="port" value="1527" />
<property name="databaseName" value="chat" />
<property name="connectionAttributes" value=";create=true"></property>
<property name="user" value="APP" />
<property name="password" value="APP" />
</jdbc-connection-pool>
<jdbc-resource enabled="true"
jndi-name="java:app/jdbc/ChatDB"
pool-name="ChatDBPool" />
</resources>
控制台
javax.ejb.EJBException
at com.sun.ejb.containers.EJBContainerTransactionManager.processSystemException(EJBContainerTransactionManager.java:752)
at com.sun.ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:702)
at com.sun.ejb.containers.EJBContainerTransactionManager.postInvokeTx(EJBContainerTransactionManager.java:507)
at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4566)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2074)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2044)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:212)
at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:79)
at com.sun.proxy.$Proxy286.registerUser(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie.dispatchToMethod(ReflectiveTie.java:143)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:173)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatchToServant(ServerRequestDispatcherImpl.java:528)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatch(ServerRequestDispatcherImpl.java:199)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequestRequest(MessageMediatorImpl.java:1549)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:1425)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleInput(MessageMediatorImpl.java:930)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:213)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:694)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.dispatch(MessageMediatorImpl.java:496)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.doWork(MessageMediatorImpl.java:2222)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName ChatDB
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.init(EntityManagerWrapper.java:138)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper._getDelegate(EntityManagerWrapper.java:171)
at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createNamedQuery(EntityManagerWrapper.java:544)
at de.fh_dortmund.inf.cw.chat.server.beans.UserManagementBean.registerUser(UserManagementBean.java:146)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4786)
at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:656)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:73)
at org.jboss.weld.ejb.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:52)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608)
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163)
at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140)
at sun.reflect.GeneratedMethodAccessor71.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369)
at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4758)
at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4746)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:205)
... 19 more
在这一点上我不知道如何开始这个问题，我错过了什么？我应该检查什么？您还需要什么详细信息？
这个：
project-ejb
--META-INF
----persistance.xml
看起来很可疑。
您似乎拼错了 "persistence.xml"。